Tflite based object counting error

Hi all,
It is my first topic in this forum.
I m trying to follow this → GitHub - TannerGilbert/Tensorflow-2-Object-Counting: Cumulative object counting with Tensorflow 2
where it uses
“” and “” for counting pedestrians. “” works just fine, But when try to use “” it throws (ImportError: generic_type: type “InterpreterWrapper” is already registered!) error. Since, Im new to tensorflow I couldn’t figure it out. What might be the reason for this error? Any help would be appreciated.